Read Test For Eeprom; Ram Read Only Check; Voltage Check Of Memory Back-Up Battery - Casio 200CR Service Manual

4-4-3. Read/write test for EEPROM
Operation :
Execute the Read/write test in test area (1word) of EEPROM.
Note: This test is effected on 240CR only.
If an error is occurred, the machine sounds an error tone, prints " — — — — — — — 8"
on receipt, and stops this test.

4-4-4. Read test for EEPROM

Operation :
The machine reads out the data to compare with written data until an error is occurred and
brinks "—" on the display during this test.
Notes: This test is effected on 240CR only.
If an error is occurred, the machine sounds an error tone, prints " — — — — — — — 8"
on receipt, and stops this test.
To stop this test, turn the Mode Switch to "OFF" position.
Be sure to execute the Read/write test for EEPROM (3+ST) before this test.

4-4-5. RAM read only check

Operation :
Note: Be sure to execute the RAM write and read check (1 + ST) before this check.
The machine reads out the data to compare with written data until an error is occurred and
brinks " — " on the display during this check.
To stop this check, turn the mode switch to OFF position.
If an error is occurred, the machine sounds an error tone, prints " — — — — — — — 2 " on
the receipt, and stops this check.

4-4-6. Voltage check of memory back-up battery

Operation :
Display the voltage of back-up battery in real time. (Measurement is Volt (V) level.)
To stop this check, press any key or turn the mode switch to OFF position.
X X
In case the voltage level is less than 3 V, display "L" here.
3 + ST
4 + ST
5 + ST
7 + ST
X
Voltage level
— 7 —
L